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    'I Have a Dream' speech turns 50

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'I Have a Dream' speech turns 50

Today marks the 50th anniversary of Martin Luther King Jr.'s "I Have a Dream" speech. CNN's Don Lemon has more.

'I Have a Dream' speech turns 50

Today marks the 50th anniversary of Martin Luther King Jr.'s "I Have a Dream" speech. CNN's Don Lemon has more.